Whatever you bring is part of your "costume" for the interview. This is true for your clothes, any binder or notepad you bring, and yes even a drink. It all gets measured (even if subconsciously) against the company culture and job requirements. For customer-facing roles, where an iced coffee would be inappropriate, it's probably a bad idea to bring one.
One thing that other commenters (and the article) are missing is they are making the assumption that an interview is one-way. That you truly want the job, and you're just doing whatever it takes to get there. And if you're unemployed/desperate, that might be the case.
But if you're interviewing them as well, it's really important to locate the bullshit right away. If you won't be a good fit, getting the job will be bad for everyone. This is especially true if you're leaving a decent job elsewhere. If an iced coffee is a deal breaker, is that the culture you want to step into?
I've seen places that refuse to hire men with long hair, regardless of style. You can imagine what the rest of the culture is like. Going in with long (professional-looking) hair can bring out the problems faster and in a way that no other interview tactic would. Getting rejected here is dodging a bullet. Same with a coffee.